Make your own plant-based liquid manure from comfrey
Plant manure as an organic fertilizer for your vegetables
Plant dips are natural fertilizers that you can easily make yourself from plants in your garden. They provide your vegetables with additional nutrients quickly. You also contribute to a healthy nutrient cycle. You also save money, as these natural fertilizers cost you nothing apart from a little water and effort.
Make your own nitrogen fertilizer from comfrey plants

Comfrey liquid manure is an excellent nitrogen fertilizer for your plants. In addition to nitrogen, comfrey also contains relevant amounts of potassium, phosphorus, trace elements, silicic acid and tannins. All types of comfrey are suitable for making a plant slurry.
Preparing comfrey liquid manure: how to do it
Comfrey liquid manure is prepared in the same way as nettle liquid manure. Place the chopped leaves and stems (1 kg) in a large bucket (not metal), fill with rainwater (10 l) and cover with a cloth or lid (do not seal airtight). Stir every 1-2 days. As soon as the slurry no longer foams, it is ready (1-3 weeks).
Marigold, nettle and co.

You can also add nettles to the container to increase the amount of nitrogen in your slurry. Nettles also contain relevant amounts of iron and magnesium. Marigolds can be added to the slurry to increase the potassium content. Rock flour is also a popular addition, as it binds the strong odor during fermentation.
Comfrey: effect & application

You can also use extra diluted plant slurry as a compost starter or pesticide. Spraying the leaves of plants with further diluted liquid manure (1:20) will make your plants more resistant to pests and diseases. Comfrey manure is used against spider mites, aphids and mildew.
Potash fertilizer for tomatoes
Tomatoes need a lot of potassium and calcium for their development. You can feed your tomatoes very well with a plant manure made from comfrey, as it contains a lot of potassium and calcium. You are welcome to water them once a week with the plant manure. They will enjoy the additional nutrients that comfrey provides.
Fertilizer for cucumbers, potatoes & other heavy growers

In addition to tomatoes, comfrey liquid manure is particularly suitable as a fertilizer for heavy growers such as eggplants, cucumbers, pumpkins, potatoes, peppers, celery and zucchinis. But berry bushes, lovage, fruit trees, roses and sunflowers are also happy to receive such fertilizers. You can water your plants with the liquid manure every 1-3 weeks as required.